The sodium salt shown is heated with $CO X_{2}$ at about 400 K and 4-7 atm, and the product is then acidified. Which structure is formed (Kolbe-Schmitt reaction)?

AStructure A
BStructure B
CStructure C
DStructure D

Answer: B

The salt is sodium phenoxide. The phenoxide ring attacks

CO X_{2}

electrophilically, mainly at the ortho position under these conditions. Acidification gives 2-hydroxybenzoic (salicylic) acid; the aldehyde is the Reimer-Tiemann product.

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The sodium salt shown is heated with COX2​ at about 400 K and 4-7 atm, and the product is then acidified. Which structure is formed (Kolbe-Schmitt reaction)?

Answer: B

More questions on Acidity and reactions of drawn phenols

The sodium salt shown is heated with $CO X_{2}$ at about 400 K and 4-7 atm, and the product is then acidified. Which structure is formed (Kolbe-Schmitt reaction)?